The alignment control points on a transportation construction project, such as Point of Intersection (P.I.) and Point on Tangent (P.O.T.), are referenced to which of the following?

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The alignment control points on a transportation construction project are referenced to the centerline. On these projects, the centerline is typically marked with nails or stakes. Offsets and slope stakes are referenced for layout and grade control. While an inspector typically verifies the initial placement, it is the contractor's responsibility to preserve all stakes on a project.

The Alignment Control Points on a Transportation Construction Project, Such